IS 5961: cast iron gratings for drainage purposes

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IS 5961 (1970) : cast iron gratings for drainage purposes
[CED 3: Sanitary Appliances and Water Fittings]

Jawaharlal Nehru
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IS 1 5961 • 1970

( Reaffirmed 2003 )

Indian Standard

SPECIFICATION FOR CAST IRON
GRATINGS FOR DRAINAGE PURPOSES

( Fifth Reprint SEPTEMBER 1993 )

UDC 628.251.3

® Copyright 1971

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 1100Q2

Gr 2 May 1971

19 s 5961 '1970

Indian Standard

SPECIFICATION FOR CAST IRON
GRATINGS FOR DRAINAGE PURPOSES

Sanitary Appliances and Water Fittings Sectional Committee, BDC 3

Qiairman Representing

Director Central Public Health Engineering Research

Institute ( CSIR ), Nagpur

Members
Adviser Ministry of Health, Family Planning & Urban

Develqpment
Shw H. R, Badyal The Indian Iron and Steel Co Ltd, Calcutta

Shri K. D. Biswas ( Alternate )
Chief Engineer Central Public Works Department

Superintending Engineer ( Alternate )
Chief Engineer Local Self Government Engineering Department,

Lucknow

Superintending Engineer ( Alternate )
Chief Engineer ( Water ) Municipal Corporation of Delhi

Drainage Engineer ( Alternate )
Shki H. N. Dallas The Indian Institute of Architects. Bombay

Lala G. C. Das National Test House. Calcutta

Shri V. D. Desai Bombay Municipal Corporation

Shr; Y, H. Kamat ( Alternate )
Shri K. G. Jerath Engincer-in=Ghief *s Branch, Army Headquarters

Shri R. V. Lele Central Glass & Ceranuc Research Institute ( CSIR ),

Calcutta
Shri G. A. Luhar Indian Non-ferrous Metals Manufacturers

Association, Calcutta
Shri R. N, Mallick Directorate General of Technical Development

Shri N. R, Srinivasan ( Alternate )
Shri R. M. Mehra Bombay Potteries and Tiles Ltd, Bombay

Shri V, P. Narayanan Nayar Public Health Engineering Department, Government

of Kerala
Shri R. Parikshit Indian Section of Plastic Institute. New Delhi

Shri A. H. Patel Ahm^edabad Municipal Corporation

Dr A. V. R. Rao National Buildings Organization, New Delhi

Shri G. T. Bhide ( Alternate)
Shri B. B. Rau The Institution of Engineers ( India ), Calcutta

tvEPKESENTATivE Ail India Pottery Manufacturers Association

R.EPRESENTATIVE Hindustan Shipyard Ltd, Visakhapatnam

( Continued on pn-^e 2 )

*He is also alternate to the Adviser, Ministry of Health, Family Planning & Urban
Development.

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHAHUR SHAH ZAFAR MARG
NEW DELHI 110002

IS 15961* 1970

( Continued from pagt 1 )

Members
Shri T. R* Shahaki

Shri S. N. Sharma.

Representing
Ministry of Railways
Central Building Research Institute ( CSIR );

Roorkce
Hindustan Sanitaryware Industries Ltd, Bahadurgarh

Shri R. K. Somany

Shri V. S. Bhatt ( AUgmaU )
Shri N. S. Sounde Directorate General of Supplies & Disposals

Shri G- S. Subbaraman ( AltermUe )
Shri B. Ullal E. I. D Parry Ltd, Madras

Shrx T. S. Chintamani ( Alternate )
Shri D. Ajitha Simha, Director-General, ISI ( Ex-officio Mender)

Director { Civ Engg )

Secretary

Shri C. R. Rama Rao
Deputy Director ( Civ Engg ), ISI

Domestic and Municipal Water Fittings Subcommittee, BDC 3 : 2

Convener
Hydraulic Engineer Bombay Municipal Corporation

Members
Shri A. R. Kanga { Aiternate to
Hydraulic Engineer )
Shri H. R. Badyal

Shri K. D. Biswas ( Alternate )
ShriD. G.Bapat

Shri J. Thomes ( Alternate )
Chief Engineer ( Water )
Deputy Chief Engineer
(Water) (Alternate)
ShriJ. D. Daroga
Shri Goverdhan Das P. A,
Prof Indu Bhushan
Shri S, R. Kshirsaoar

The Indian Iron and Steel Co Ltd, Calcutta
Engineer-in-Chief's Braijch, Army Headquarters
Munifcipal Corporation of Delhi

• Shri P. B. Rao ( Alternate)
Shri G. A. Luhar

Italab Engineering Private Ltd, Bombay
Goverdhan Das P. A, JuUundur City
Banaras Hindu University

Central Public Health Engmeering Research
Institute ( CSIR ) , Nagpur

Bombay Metal and Alloys

Private Ltd, Bombay
Bangalore Water Supply and
Bangalore
Shri P. L. Nanjundasw^amy ( Alternate )
Shri V. N. MisRA

Shri I. M. Maodum

Manufacturing Co
Sewerage Board,

Shri K. R. Rangarajan
Shri A. K. Ray
Shri K. Satyanarayana
Shri.K. K, Sehgal

Shri D. K. Sehgal ( Alternate )
Shri T, R, Shahani
ShriJ. N. Singh
Shri R. K. Somany

Shri V. S. BhaTt {Alternate)
Shri N. S. Sounde

Shri G, S. Subbaraman ( Alternate )
Surveyor of Works III Central Public Works Department

Indian Non-ferrous Metals Manufacturers Associa-
tion, Calcutta
Wavin India Ltd, Madras
Annapuma Metal Works, Calcutta
Kirloskar Brothers Ltd, Kirloskarwadi
Leader Engineering Works, JuUundur City

Ministry of Railways

EMCO General Industries, Calcutta

Hindustan Sanitaryware Industries Ltd, Bahadurgarh

Directorate General of Supplies & Disposals

IS : 5961 - 1970

Indian Standard

SPECIFICATION FOR CAST IRON
GRATINGS FOR DRAINAGE PURPOSES

0- FOREWORD

Q.l This Indian Standard was adopted by the Indian Standards Institution
on 19 December 1970, after the draft finalized by the Sanitary Appliances
and Water Fittings Sectional Committee had been approved by the Civil
Engineering Division Council.

0.2 Cast iron gratings are commonly used on the ctirbs of roads and foot
paths for draining away surface water to the drains. They should i>e sufli-
ciently robust and of proper construction so that they ensure long service
and also provide safety for pedestrians and vehicular traffic. It is hoped
that this standard will gh/G guidance to the manufacturers and users.

0.3 In the preparation of this standard, assistance has been derived fVom
the experience gained by the major municipal corporations in India in the
use of cast iron gratings.

0.4 This standard contains clause 4.1 which calls for agreement between
the purchaser and the supplier,

0.5 This standard contains clause 8.1.1 which permits the purchaser to use
his option for selection to suit hig requirements.

0.6 For the purpose of deciding whether a particular requirement of this
standard is complied with, the final value, observed or calculated, express-
ing the result of a test or analysis, shall be rounded off in accordance with
IS: 2-1960*, The number of significant places retained in the rounded
off value should be the same as that o^ the specified value in this standard.

1. SCOPE

1.1 This standard covers the requirements for cast iron gratings intended
for use in drainage works.

*I^ulcs for rounding offnumerica) values ( r^vusd).

3

18:5961-1970

2. MATERULS

2.1 The frame and cover shall be of grey cast iron conforming to Grade 15

of IS: 210-1962*.

2.2 Hinge pins ghall be made of mild-steel wire of J hard condition spcci*
fied in IS r 280-1962+ unless otherwise specified by the purchaser,

3. MANUFACTURE AND WORKMANSHIP

3.1 The frame and the cover shall be cleanly cast and they shall be free
from air and sand holes, cold shuts and warping which are likely to impair
the utility of castings.

4. CONSTRUCTION

4.1 The cast iron gratings shall be mide in accordance with the details
show^n in Fig. 1, These may be made for dimensions other than those
shown in Fig. I where so agreed to between the manufacturer and the
purchaser.

4.2 Locking Devices — Internal locking devices, sucji as galvanized chain
or lock or a combination of both may be provided if required by the pur-
chaser.

5. DIMENSIONS AND TOLERANCES

5.1 Dimensions — The dimensions shall conform to those specified in
Fig* 1^

5.2 Tolerances — In order to provide interchangeability of cover and
frames internal dimensions of the top of the frame shall not vary more
than d=2 mm from the dimensions specified for the same.

6. WEIGHT

6,1 The minimum weight of cast iron gratings shall be 75 kg.

7. COATING

7.1 The drainage cover and frame shall be coated with a material having
tar base with a black bituminous composition after the surface is rendered
smooth by chipping the projections, if any; surface shall also be clean, dry
and free from any rust before coating. The coating shall be smooth and
tenacious which will not flow when exposed to a temperature of 63"C and'
shall not be so brittle as to chip off at temperature of 0*^0.

•Specification for grey iron castings ( revised), ( Since rcvJa«d ).
tSpecification for mild steel wire for general engineering purposes ( revised), ( Since
revised )

4

IS: 5961 -1970

-•°'**^ ^SECTION XX

DETAIL OF
TAPEfl SUPPORT

Ail dimensions in millimetre*.

FiG. 1 '" Typical iLLUsTfeATiON of Cast Iron Grating for
Drainage Purposes

IS: 5961 -1970

8. TESTS

8.1 Samples for Load Test — The number of samples to be tested shall
be one for every lot of 25 or part thereof. In the event of any one of the
articles tested failing to meet the requirements of this standard, the articles
in the batch shall be deemed not to comply with the requirements of this
standaxd unless individually tested. The manufacturer shall keep the
records of ajl tests and shall make these available to the purchaser on
request,

8.U If the purchaser requires additional tests to be carried out, this
shall be stated in the enquiry and order. The manufacturer shall provide
every facility for the purchaser to select such samples as he may require
from a consignment prior to delivery atod the tests shall be carried out in
the presence of the manufacturer and the purchaser, or his representative,
if he so desires.

The cost of each additional tests shall be borne:

a) by the purchaser in the event of the result meeting the require-
ments of this standard, and

b) by the manufacturer in the event of the result ftot meeting the
requirements of this standard.

8«2 Testing Procedure and Requirements — The gratings shall with-
stand without fracture a load of 35 t for a minimum period of 30 s when
subjected to loading test described in IS ; 1726-1967*.

9. INSPECTION

9.1 The purchaser or his authorized representative shall have free access to
the works of the manufacturer at all reasonable times for carrying out in-
spection during the course of manufacture. Should the purchaser or his
authorized representative desire to witness the test specified in 8.2, he shall
inform the manufacturer who shall give reasonable notice of the date or
dates on which the test will be carried out. The purchaser or his authori-
zed representative shall, if he so desires, be enabled to carry out inspection
of covers and frames prior to the application of coating.

10. MANUFACTURJBR'S GUARANTEE

10.1 When so requested by the purchaser, the manufacturer shall supply,
free of cost, a certificate stating that each lot or part thereof of grating has
been subjected to the requirements laid down in 8.2 and conform in all
respects to this specification.

^Specification for cast iron manhole covert and frames intended for use sn drainage
works {first reotsion ).( Since revised ).

ISs5961-1970

n. MARKING

ll.l Each cast iron gratings shall have cast on the covers the informadon
regarding manufacturer's name or trade-mark.

11.1.1 Each grating may also be marked with ths ISI Certification
Mark,

Note — The use of the ISI Certification Mark is governed by the provuions of the
Indian Standards Institution ( Certification Marks ) Act, and the Rules and Regula*
tions made thereunder. Presence of this mark on products covered by an Indian
Standard conveys the assurance that they hav,e been produced to comply with the
requirements of that standard, under a well-defined system of inspection, testing and

?uality control during production. This system, which is devised and supervised by
Sl and operated by the producer, has the further safeguard that the products as
actually marketed are continuously checked by ISI for conformity to the standard.
Details of conditions, under which a- licence for the use of- the ISI Certification Mark
may be granted to manufacturers or processors, may be obtained from the Indian
Standards Institution.

BUREAU OF INDIAN STANDARDS

Headquarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 1 10002

Telephones; 331 01 31, 331 13 75 Telegrams: Manaksanstha

( Common to all Offices)

Regional Offices', Te/ephone

Central Manak Bhavan, 9 Bahadur Shah Zafar Marg, C331 01 31

NEW DELHI 110002 |331 13 75

•Eastern : 1/14 C. I. T. Scheme VII M, V. I. P. Road, 36 24 99

Maniktola, CALCUTTA 700054
Nortnern : SCO 445-446, Sector 35-C, ( 2 18 43

CHANDIGARH 160036 I 3 16 41

r41 24 42
Southern : C. I. T. Campus, MADRAS 600113 ^ 41 25 19

I 41 29 1 6
tWestern : Manakalaya, E9 MIDC, Maroi, Andheri ( East ), 6 32 92 95
BOMBAY 400093

Branch Offices:

'Pushpak'. Nurmohamed Shaikh Marg, Khanpur, ( 2 63 48

AHMADABAD 380001 } 2 63 49

IPeenya Industrial Area 1st Stage, Bangalore Tumkur Road (38 49 55

BANGALORE 560058 J38 49 56

Gangotri Complex, 5th Floor, Bhadbhada Road, T. T. Nagar, 6 67 16

BHOPAL 462003
Plot No. 82/83, Lewis Road. BHUBANESHWAR 751002 5 36 27

53/5. Ward No. 29, R.G. Barua Road, 5th Byelane, 3 31 77

GUWAHATI 781003
5-8-56C L. N. Gupta Marg ( Nampally Station Road ), 23 10 83

HYDERABAD 500001

R1 4 Yudhister Marg, C Scheme. JAIPUR 302005 i g 98 32

117/418 B Sarvodaya Nagar, KANPUR 208005 j^j || ^

Patliputra Industrial Estate, PATNA 80001 3 6 23 05

T.C. No. 14/1421. University P.O.. Palayam /6 21 04

TRIVANDRUM 695035 \6 21 17

Inspection Offices ( With Sale Point ):
Pushpanjali. First Floor, 205-A West High Court Road, 2 51 71

Shankar Nagar Square, NAGPUR 440010
Institution of Engineers ( India ) Building, 1 332 Shivaji Nagar, 5 24 35

PUNE411005

*Sales Office In Calcutta is at 5 Chowringhee Approach, P. 0. Princep 27 68 00
Street. Calcutta 700072

tSales Office in Bombay is at Novelty Chambers. Grant Road, 89 65 28
Bombay 400007

ISales Office in Bangalore is at Unity Building, Narasimharaja Square, 22 36 71
Bangalore 560002

Reprography Unit, BIS, New Delhi, India